In neonates and children, the causes of cardiac arrest are diverse; the most common are traffic accidents, drowning, burns, gunshots, poisoning, smoke inhalation, SIDS, airway obstruction and asphyxia by foreign bodies, airway or respiratory system infection and congenital heart disease. In adults, it is mainly secondary to severe coronary artery disease, most of which are combined with malignant ventricular tachycardia and arrhythmia. In children, hypoxemia is common In children, malignant ventricula